Hot air radiator

ABSTRACT

A radiator attachment for conduits conducting heating fluids is provided having an extended heat transfer surface in the form of helically wound fins forming channels to conduct ambient air in heat transfer relation to the heating fluid. The radiator attachment is formed of split plates that enclose the conduit and are held together thereabout by a threadless connector.

United States Patent 2,413,179 12/1946 Grandmont et a1 Inventor Felix P. Trijonis 6 White Oak Ave, Plainville, Conn. 06062 Appl. No. 765,573 Filed Oct. 7, 1968 Patented Jan. 19, 1971 HOT AIR RADIATOR 2 Claims, 5 Drawing Figs.

US. Cl 165/80, 165/183, 165/131 Int. Cl F28f 7/00 Field of Search 165/182- References Cited UNITED STATES PATENTS 2,644,225 7/1953 Dietz 165/183X 3,305,013 2/1967 FriedI et al.... 165/183 2,574,142 11/1951 Buongil'no 165/77 3,231,011 I/1966 Shenuski 165/131X 3,438,436 4/1969 Koponen 165/77X Primary Examiner-Martin P. Schwadron Assistant Examiner-Theophil W. Streule Attorney-John F. Carney ABSTRACT: A radiator attachment for conduits conducting heating fluids is provided having an extended heat transfer surface in the form of helically wound fins forming channels to conduct ambient air in heat transfer relation to the heating fluid. The radiator attachment is formed of split plates that enclose the conduit and are held together thereabout by a threadless connector PATENT'EDJAMQIM- 3556206 I SHEEIIUFZ IN VENTOR Fa/x R Tam/0M8 HOT AIR RADIATOR I SUMMARY i This invention comprises two metal plates that enclose the pipe that leads from a furnace to a chimney. Each of the aforesaid metal plates are nearly the same length as the piece of pipe on which they are placed and suitably secured by two or more opposed rectangular locking members.Each locking member is secured without the use. of screws or the like, as will hereinafter be described. A plurality of helicallydisposed and equally spaced fins of the same length as that of the two aforesaid metal plates are welded or otherwise secured to the plates, thereby providing a practical me'thodof dispensing the heat in the room that radiates from the pipe to the chimney.

It is the principal object of this invention to provide a hot air radiator that will put to use the heat that normally escapes this invention will become apparent the reading of this specification and its appended claims proceeds and the accompanying drawings are examined.

In the drawings:

FIG. 1 is a side view of this invention,;secured to the pipe that extends from a furnace toa chimney. Only the invention is shown in solid lines; the furnace pipe andthe chimney are drawn in phantom lines.

FIG. 2 is a side view of this invention.

FIG. 3 is an end view of this invention.

FIG. 4 is a sectional view of this'irivention, taken substan tially along line 4-4 of FIG. 3, and viewed inthe direction indicated by the arrows. i.

FIG. 5 is a sectional view of this invention, taken substantially along line 55 of FIG. 3, and viewed in the direction in dicated by the arrows.

In the several views of the accompanying drawings, like parts are indicated by like reference numbers.

The reference number 10 is a hot air radiator constructed according to the invention. The radiator 10, in the preferred embodiment of the invention, comprises a pair of oppositely facing, arcuately formed, metal plates1ll that cooperate to tightly encircle and be attached to a conduit 23 that conducts high temperature fluid. In the arrangement disclosed herein,

the conduit 23 is in the form of a fluepipe connecting a furnace 24 with a chimney and, as such,.conducts flue-gas. It will be understood, however, that the .present radiator arrangement is equally adaptable for attachment to conductors of other heating media such as hot airor steam. I

As shown in FIG. 2, the plates arefiprovided with a plurality of substantially equally spaced, helical fins 12 thatprotrude from the external surface of the plates and that extend substantially lengthwise thereof. Adjacent fins 12 cooperate to'form open, helical channels for conducting ambient air that flows into contact withtheradiator along'the surface thereof for some distance thereby retaining it in heat transfer relation with the high temperature fluid flowing I through the conduit 23 to which the plates 11 are attached.

The inclination of the fins I2, andthereby the channels, with respect to the longitudinal axis of the plates 11 is relatively shallow, preferably about 14 54, in order to retain the ambient air in heat transfer relation with the high temperature fluid over a greater length of the heat-tran'sfersurface. The means for connecting the plates 11 aboutlthe conduit 23 comprise an opening 17 of component shape including acircular portion and an intersecting rectangular slot provided in one fin, indicated as 16, on one of the plates. 0n the other plate a fin, indicated as 13, is provided with a rectangular slot 14 that is disposed in vertical alignment with the opening 17 and at substantially right angles with respect to the rectangular portion of the former opening. A rectangular, lock bar 20 having a neck 21 adjacent one end and a rectangular slot 22 adjacent the other end is adapted for insertion into the opening 17 with the end bearing theslot being inserted first. The lock bar 20 is extended through the opening 17 until the neck 21 is laterally aligned with the fin l6 whereupon the bar' is rotated until its leading end extends through the slot 14 in fin l3. Thereafter a tapered wedge, indicated as 19, is insertedinto the slot 22 on the side of the fin l3 furthest from fin l6 whereupon the opposed plates ll are attached firmly together.

The means of locking the two aforesaid 'sheets of metal I], having the previously described fins thereon, is not shown in FIG. I for reasons of clarity and only one locking device is shown in FIG. 2 for the same reason..

The operation of the herein described apparatus is as follows. A number of plates 11 adapted to enclose substantially the entire length of a conduit 23 extending between a furnace l8 and its associated chimney are attached to the conduit as by means of connectors 20 described hereinabove. The cooler ambient air in the vicinity of the apparatus 10, in flowing into contact with the plates 11 will be retained in the channelsformed by the fins 12 and conducted for an extended distance across the plates in heat exchange relation with the high temperature fluid flowing through the conduit 23 whereby the air will be heated prior to being passed off to its environment. Due to the fact that cool air rises, it should be noted that the flow of ambient air in the present arrangement will generally be in a direction upwardly from the floor into contact with the apparatus 10. For this reason, the fins 12 and channels formed thereby should be inclined upwardly in the direction of the higher temperature end of the conduit 23. In this way more effective use is made of the heat transfer surface in that the cooler ambient air is caused to flow counter to the direction of flow of the heating fluid.

This invention, whose construction I have just described and which I personally call a heat radiator, is not to be limited to furnaces but can also be adapted to mounting on steam pipes or conductors of other high temperature fluids. This invention can be made for any desired diameter pipes and the fins can be of any desired length and set at any angle one may desire.

This invention is subject to any and all changes in detail design and/or modifications one may care to make in the same in so long as the changes and/or modifications fall within the scope and intent of the appended claims.

Iclaim: I

1. In combination with a generally cylindrical conduit for conducting heating fluid, a radiator attachment for the exchange of heat between heating fluid flowing within said conduit and ambient air passing exteriorly of said conduit, said attachment comprising: 7

a. a pair of opposed, substantially identically formed, axially elongated metal plates each being provided with an inner surface of generally semicylindrical configuration and cooperating to tightly encase and be contiguous with said conduit; a plurality of upstanding fins extending substantially radially from the external surface of said plates, said fins being helically wound at a slight angle of inclination with respect to the axis of said conduit upwardly in the direction of the higher temperature end thereof, said fins being mutually spaced from oneanother to form helical channels all of which open outwardly from the surface of said plates; and

c. means for attaching said plates in enclosing relation about said conduit.'

2. The combination as recited in claim I wherein the abutting edges of said plates comprise radially extending fins and wherein said-attachingmeans comprises:

i a. aligned openings formed in said abutting fins and in fins a lock bar, rectangular in section containing a neck portion adjacent one end and a rectangular opening adjacent the other end;

c. said lock bar being insertable into said opening of compound shape in said one adjacent fin to pass through said circular openings in said abutting fins and being rotatable therein for ultimate insertion of the leading end of said lock bar in the rectangular slot in said other adjacent fin with the rectangular opening in said lock bar being disposed on the remote side of said other adjacent fin, and v a wedge insertable into said rectangular opening having a tapered surface engageable with the adjacent fin and operative to urge said opposed plates into tight engagement about the periphery of said conduit. 

1. In combination with a generally cylindrical conduit for conducting heating fluid, a radiator attachment for the exchange of heat between heating fluid flowing within said conduit and ambient air passing exteriorly of said coNduit, said attachment comprising: a. a pair of opposed, substantially identically formed, axially elongated metal plates each being provided with an inner surface of generally semicylindrical configuration and cooperating to tightly encase and be contiguous with said conduit; b. a plurality of upstanding fins extending substantially radially from the external surface of said plates, said fins being helically wound at a slight angle of inclination with respect to the axis of said conduit upwardly in the direction of the higher temperature end thereof, said fins being mutually spaced from one another to form helical channels all of which open outwardly from the surface of said plates; and c. means for attaching said plates in enclosing relation about said conduit.
 2. The combination as recited in claim 1 wherein the abutting edges of said plates comprise radially extending fins and wherein said attaching means comprises: a. aligned openings formed in said abutting fins and in fins adjacent thereto on the respective metal plates, the openings in said abutting fins being substantially circular, the opening in one of said adjacent fins being of compound shape including a circular portion and an intersecting rectangular slot of greater length than the diameter of said circular portion and the opening in the other of said adjacent fins being a rectangular slot of substantially the same extent as that in said one adjacent fins but disposed at substantially right angles thereto; b. a lock bar, rectangular in section containing a neck portion adjacent one end and a rectangular opening adjacent the other end; c. said lock bar being insertable into said opening of compound shape in said one adjacent fin to pass through said circular openings in said abutting fins and being rotatable therein for ultimate insertion of the leading end of said lock bar in the rectangular slot in said other adjacent fin with the rectangular opening in said lock bar being disposed on the remote side of said other adjacent fin, and d. a wedge insertable into said rectangular opening having a tapered surface engageable with the adjacent fin and operative to urge said opposed plates into tight engagement about the periphery of said conduit. 